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Mathematics (09) Practice Test17. Use the table below to answer the question that follows.f(2) – f(1) f(3) – f(2) f(4) – f(3) f(5) – f(4)f 1(x) 1 4 9 16f 2(x) 2 2 2 2f 3(x) 3 5 7 9f 4(x) 4 5 7 10The table above shows the first differences of four functions.Based on their second differences, which of the followingfunctions is quadratic?A. f 1(x)B. f 2(x)C. f 3(x)D. f 4(x)18. Use the portion of Pascal's triangle below to answer thequestion that follows.11 11 2 11 3 3 11 4 6 4 11 5 10 10 5 1Based on the portion of Pascal's triangle above, which of thefollowing values is the coefficient of the x 3 y term in theexpansion of (x + y) 4 ?A. 3B. 4C. 5D. 613